CN102891779A - Large-scale network performance measuring system and method for IP network - Google Patents
Large-scale network performance measuring system and method for IP network Download PDFInfo
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Abstract
The invention relates to a large-scale network performance measuring system and method for an IP network. The large-scale network performance measuring system consists of a server and a plurality of network probes, wherein the server consists of a server and a client side and is positioned in a core network, the plurality of network probes are positioned in a measured network, the server is a computer or server which has a massive network data processing capability and is used for generating a measuring task, interacting with the network probes, issuing the measuring task and acquiring measuring results as well as collecting and presenting the measuring results uploaded by the network probes; and the network probes are embedded equipment or computers which are distributed in a clustering manner and are used for receiving and executing the measuring tasks of the server, mainly executing active network measurement and reporting the measuring results. The large-scale network performance measuring system has the capabilities of submitting the measuring results through NAT (Network Address Translation) and acquiring the next measuring task; and the large-scale network performance measuring system has a little influence on the firewall strategy. Besides, the large-scale network performance measuring system has strong real-time property of measuring data, assurance of service quality, large measurement range, capability of realizing measurement among networks, flexible and variable measurement topology, large system capacity, large expandability and favorable popularization prospect.
Description
Technical field
The present invention relates to a kind of large scale network performance measurement system and method, exactly, relate to a kind of large scale network performance measurement system and method for initiatively measuring for IP network, be used for solving existing IP network, the measuring range of the inter-network network measure that produces because of fire compartment wall and network address translation NAT is little, measure the multiple shortcoming that topology is single, real-time is poor and autgmentability is poor, belongs to the technical field of data communication.
Background technology
Since the Internet was born, the measuring technique of network performance also produced thereupon.Over more than 40 years, people ceaselessly study how to measure network performance and the various new methods of measuring network, to adapt to the Internet in fast-developing and the expansion.Produce in the meantime all very good network performance measurement systems of many structural designs and performance, and in the network tuning, all produced far-reaching influence in networking and the planning.
The purpose of network research is to set up efficient stable, the network that safety is controlled.Network performance measurement is the most effectual way that obtains every real-time factor parameter in the network.Then, build model based on measurement result, measurement data is analyzed, be conducive to people and deeply understand network, the development of prediction network solves the network potential problems.Thus, network measure is the runnability of Collection and analysis procotol, the numerical value that the help people obtain network property indices parameter and then the effective means of investigating network problem.
Network performance measurement comprises following three key elements:
Measuring object: comprise network node, link or application etc., the various performances of measured node, link or Internet Transmission: the propagation delay time, throughput, the packet loss that comprise link, the router efficiency of router, time delay, packet loss, the answering delay of Web server, throughput, power system capacity and maximum stable link number etc.
Measurement environment: comprise the type on the determining of the choosing of measurement point, Measuring Time, network probe and communication link road etc.
Method of measurement: for each network of network performance index, all will carry out following operation: choose first suitable method of measurement, this method of measurement should satisfy robustness at least: the dynamic change of tested network can not make method of measurement lose efficacy; Secondly, should satisfy repeatability: same network condition, repeatedly measurement result should be consistent; Again, should satisfy accuracy: measurement result should be able to reflect the truth of network.
Because the difference of internet and conventional telecommunications net, the communication quality of packet switching can constantly change in communication process.Therefore, for the internet, network performance measurement has prior meaning.Rise the nineties in 20th century, and many mechanisms begin one's study and design the measuring system of internet performance.Nineteen ninety-five U.S. NSFC (NSF) has carried out fairly large systematic survey to Internet traffic at that time.At the beginning of 1996, U.S. application network research National Laboratory (NLANR) has held relevant internet statistics and the seminar ISMA that analyzes.After this, the internet data analysis cooperative association (CAIDA) that relies on Univ California-San Diego USA's supercomputing center has carried out systematic research to correlation theory and the method for network measure.IETF has also set up the operational factor that task force IPPM formulates network.The paper " An Architecture for Large-scale Internet Measurement " that doctor V.Paxson in 1997 delivers has become the classical documents in network performance measurement field.
According to the statistics of CAIDA, the U.S. has 21 (wherein disclosed 15, private 6) about open, the private performance measurement measuring system of internet.China also has many universities and scientific research institution to participate.The large-scale internet performance measurement model (LIPM) of Tsing-Hua University, the internet performance measuring system (NAPM) of Xi'an Communications University has proposed the concept of application probe and regional probe.The customizable network measure base frame (CNMI) of BJ University of Aeronautics ﹠ Astronautics is the advantage of utilizing the Java platform, so that system is easy to exploitation and disposes.The distributed network measurement architecture (DNMAI) that Xian Electronics Science and Technology University proposes, and developed Embedded measured node.In addition, also has the MAWI of Japan, the PPNCG measure the item in Europe etc.
But prior art exists following problem:
(1) configuration is complicated, because existing system mostly is the research system, its main user is the scientific research personnel, and the measuring equipment of its use is more special, and the place network need to be adjusted mostly specially, and is not easy to operate.
(2) can't the passing through NAT gateway, measure topological structure restricted.Because existing method of measurement is not yet considered the effect of NAT gateway, current mechanism can't be crossed the NAT gateway and be carried out efficient communication.Become very difficult so that measure Intranet.
(3) high cost is difficult to commercialization.Since existing measuring system mainly based on server as measuring equipment, so that high cost.Reality is promoted relatively difficulty or scale and is subject to the cost restriction and can't forms large scale measurement.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of large scale network performance measurement system and method for IP network, the present invention adopted new measuring system framework and communication mechanism thereof, measure so that the network performance measurement system can finish interior the measurement with across a network of the net of large scale network, have good real-time and extensibility.
In order to achieve the above object, the invention provides a kind of large scale network performance measurement system for IP network, it is characterized in that: described system is comprised of the server that is arranged in core net that is server and client framework and a plurality of network probes that are positioned at tested network; Wherein:
Server, formed by the computer with mass network data-handling capacity or server, be used for generating the measurement task, and carry out interactive communication with network probe, sending measuring task and obtain measurement result, and the measurement result that network probe is uploaded is gathered and presents; Be provided with: Subscriber Interface Module SIM, task scheduling modules, communication module and four parts of database;
Network probe, by have the network measure ability, and embedded device or the computer that can communicate by letter and be distributed type assemblies with server interaction form, be used for receiving and carry out the measurement task from server, and measurement result reported server; The network measure that this network probe is carried out, finished is take active network measurements as main: judge network state by send data, observation status transmission, required time and result in network; Be provided with communication module, task scheduling modules and three parts of test module.
In order to achieve the above object, the present invention also provides a kind of method of measurement that adopts large scale network performance measurement system of the present invention, it is characterized in that: described method comprises following operating procedure:
Step 1, the initial registration of network probe: after network probe is arranged at tested network, to server registration;
Step 2, network probe is carried out network measure: network probe and server cycle interactive communication, obtain the measurement task, carry out the active network measurements operation, again measurement result is sent to server.
The present invention has following advantage:
(1) be subjected to NAT and fire compartment wall to affect very little: because system of the present invention adopts the communication strategy of periodically initiating connection request from subnet to core net, therefore, can pass NAT and submit measurement result to, and obtain to measure task next time.And, initiate to the low priority network owing to connecting by high-priority network, also very little on the impact of firewall policy.
(2) real-time, service quality QoS is guaranteed: the message that sends and return is standard compliant network service message specification (such as http protocol etc.) all, guarantee so that router is easy to realize its QoS, improved communication quality, promoted the real-time of measurement data.
(3) measuring range is large, but the inter-network measurement is measured topology flexible and changeable: because network probe is distributed in each subnet, can measure the network performance between the different sub-network.Therefore, the network measure mode of system of the present invention is very flexible, has broken away from the in the past restriction of the measurement topology of star.
(4) power system capacity is large, and extensibility is good: when using large-scale network probe, can use a plurality of servers to carry out load balancing, improve the capacity of system.
Description of drawings
Fig. 1 is the large scale network performance measurement system structure composition schematic diagram that the present invention is used for IP network.
Fig. 2 is the method for measurement operating procedure flow chart of large scale network performance measurement system of the present invention.
Fig. 3 is the network probe initial registration stage flow chart in the method for measurement of the present invention.
Fig. 4 is network probe in the method for measurement of the present invention and the periodic communication process of server.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is a kind of large scale network performance measurement system for IP network, and its design original intention is to make it have larger measuring range, better extensibility, and better real-time.
Referring to Fig. 1, the structure of introducing system of the present invention forms, and is provided with two kinds of parts: the server that is arranged in core net and a plurality of network probes that are positioned at tested network that are server and client framework.In system when operation, produced the measurement task and be issued to each network probe by server, finishes actual network measure by network probe again, and feed back to server and carry out aggregation process.Wherein,
Server is computer or the server with mass network data-handling capacity, be used for generating the measurement task, and carry out interactive communication with network probe, sending measuring task and obtain measurement result, and the measurement result that network probe is uploaded is gathered and presents; Be provided with: Subscriber Interface Module SIM, task scheduling modules, communication module and four parts of database; The function of all parts is:
Subscriber Interface Module SIM is responsible for using the WEB page mode via communication module and user interactions: obtain user's measurement demand, and be converted into the active data form and deposit database in; When the user inquired about measurement result, the measurement result that inquiry is finished from database presented to the user with data or graph mode.
Task scheduling modules is responsible for user's measurement demand is converted to a plurality of measurement tasks, and according to the measurement task load situation of each network probe, in dynamic adjustment mode to network probe sending measuring task; After namely taking out the measurement task from database, it is carried out real-time dynamic order and forms the measurement task sequence, and deposit in respectively in the task queue of each network probe, when wait is communicated by letter with network probe, send to the other side via communication module.
Communication module is provided with user interface and network probe interface, is responsible for and user and network probe interactive communication respectively.User interface wherein has two effects: receive user's measurement request, and be converted into burst or periodically measure task, be stored in the database again; And when user access server, measurement result is presented to the user by data or graph mode, and transmit measurement data according to user's inquiry to the user.The network probe interface is responsible for the interactive communication between the network probe: take out the measurement task and encapsulation of this network probe from task scheduling modules after, send to this network probe; Simultaneously, after the measurement result of automatic network probe is carried out the data processing in the future, deposit in the database.HTML (Hypertext Markup Language) HTTP(Hypertext Transfer Protocol is used in the communication of this moment), with QoS and the convenient flexible configuration fire compartment wall of guaranteeing service quality: in the measuring process, regularly initiate transmission control protocol TCP(Transmission Control Protocol by network probe) connect, by domain name mode connection server, so that the network address translation NAT(NetworkAddress Translation of gateway can pass through in this system), carry out maximum across a network and measure.And because adopting the domain name access mode, so that server can be realized load balancing at domain name system DNS (Domain Name System) layer, and the IP address of assurance server can realize switching and migration.Network probe uses HTTP POST mode will measure task and measurement result and puts into the packet load of small-sized data encapsulation format and send to server; Return the packet of http response to network probe by server again, in order to avoid the phenomenon that low memory appears in the built-in network probe occurs.
Database is responsible for arranging a plurality of tables of data, be respectively applied to store the much information that comprises user, network probe, measurement task and measurement result that derives from each corresponding module, and the measurement task is offered task scheduling modules dispatch and distribute, and the measurement result submitted to of received communication module.
Network probe by have the network measure ability, and embedded device or the computer that can communicate by letter and be distributed type assemblies with server interaction form, be used for receiving and carry out the measurement task from server, and measurement result reported server.The network measure that this network probe is carried out, finished is take active network measurements as main: judge network state by send data, observation status transmission, required time and result in network.Be provided with communication module, task scheduling modules and three parts of test module, all parts function is as follows:
Communication module is responsible for and server cycle interactive communication, obtain the measurement task of server after, with its unloading in the task queue of task scheduling modules; Simultaneously, receive the measurement result that test module is beamed back, and be stored in interim buffer area, so that during next time with server communication, it is reported server.
Task scheduling modules be responsible for according to task priority to the measurement task dispatch with distribute after, give test module and carry out network measure.
Test module is responsible for receiving the measurement task from task scheduling modules, and the control of the scheduler module that receives an assignment, and initiatively carries out network measure; Described measurement task definition comprises delay (PING) and the route (TRACEROUTE) of measuring between the network node, the analysis result of domain name (being the DNS inquiry).
The main body of the network performance measurement of system of the present invention is the network probe that is distributed type assemblies, and its effect mainly contains two: adopted before this specific communication mechanism and server communication, and obtained the measurement task, and measurement result is returned to server; Then being to carry out network measure, mainly is active network measurements, by send data in network, observe status transmission and result, and required time is judged the state of network.
Referring to Fig. 2, introduce the operating procedure of large scale network performance measurement system method of measurement of the present invention:
Step 1, the initial registration of network probe: after network probe is arranged at tested network, to server registration (referring to Fig. 3).In this step 1, network probe is carried out following content of operation:
(11) first judge whether that according to the flag bit in the nonvolatile storage this network probe stored the IP address of configuration, if then carry out subsequent step (12); Otherwise, redirect execution in step (13).
(12) according to the IP address that arranges in the nonvolatile storage, the network interface configuration function that calls network protocol stack arranges the IP parameter, after accomplishing the setting up, and redirect execution in step (16).
(13) judge whether the server of carrying out DynamicHost setting protocol DHCP (Dynamic Host Configuration Protocol) is set, if having, then carry out subsequent step (14) in the IP network; Otherwise, redirect execution in step (15).
(14) according to the standard of DHCP, automatically perform the operation of IP address configuration; And in carrying out the configuration operation process, any one step is carried out unsuccessfully, just changes over to carry out subsequent step (15); After only finishing configuration operation, redirect execution in step (16).This step comprises following content of operation:
(14A) the TCP connection is initiated and set up to network probe to server;
(14B) network probe will comprise that separately ID number, the log-on message of network configuration are packaged in the TCP bag, send to server again; Server is retrieved database according to its ID after receiving the log-on message bag of network probe, if find that this network probe is unregistered, then opens up new list item, finishes the registration operation; Once registered in the past if find this network probe, then upgraded its information, finished registration process;
(14C) server returns the TCP bag that comprises the information of succeeding in registration to network probe, if this network probe also has its measurement task that need to finish, then this communication TCP wraps also to comprise and measures task list for the first time;
After (14D) network probe receives the return information of server, finish registration process.
(15) user to adopt the human configuration mode be the network probe configuration of IP address: comprise and open a Webpage and the user configures alternately, or the user adds in the identical subnet in the IP address of network probe acquiescence, accesses this webpage and be the network probe configuration of IP address, or the user is the network probe configuration of IP address by debugging interface and serial ports; After finishing the human configuration of IP address, carry out subsequent step (16).
(16) submit log-on message to server, and judge whether to succeed in registration according to feedback information; If registration failure is then notified user's registration failure, and return execution in step (11), re-register; If succeed in registration, then preserve the IP address configuration information, prepare against and carry out self-configuration when restarting next time.
Step 2, network probe is carried out network measure: network probe and server cycle interactive communication, obtain the measurement task, then carry out the active network measurements operation, again measurement result is sent to server.
This step 2 comprises following content of operation:
(21) after network probe obtains the IP address of server to the dns server inquiry, initiate TCP to server and connect, so that both sides connect.
(22) after connection was set up, network probe was contained in last measurement result in the HTTP packet, sends to server again; Described measurement result data are used data exchange language JSON(Javascript Object Notation) format, and place HTTP POST message load.
(23) after server receives the test result of network probe, from database, take out the measurement task in next cycle in the task queue of this network probe, after re-using JSON it being formatd, place the HTTP returned packet, send to network probe.
(24) after network probe receives the message of measurement task, resolution data from the JSON form, the task queue of restoring, and finish this TCP connection.
(25) network probe carries out the active network measurements operation according to the measurement task that receives; Until after reaching the cycle time that arranges, return execution in step (22), network probe is communicated by letter with server interaction, and this measurement result is contained in the HTTP packet, sends to server; Then begin new measuring period.At this moment, the active network measurements of network probe execution comprises following content of operation:
(25A) network probe uses Internet Control Message Protocol ICMP(Internet Control Message Protocol) echo request/reply (Echo Request/Reply) function and timer, the target of certain IP address is carried out the measurement of round trip transmission delay, obtain time delay (PING) numerical value between network node;
(25B) echo request/answering of network probe use ICMP, and the time-to-live TTL(Time To Live that at every turn increases progressively setting in the IP packet) field is measured the route that arrives target.
Subtract 1 because ttl field is every through a router, when the TTL numerical value in the IP packet that arrives at a certain router returns 0, this router can send to the transmission address of packet the ICMP bag that comprises the TTL time-out error, from the wrong designation data bag that returns, parse the address of router corresponding to this TTL numerical value for network probe, and the jumping figure that arrives this router, obtain the tabulation of IP address of router sequence between destination address and the network probe.
(25C) network probe compares the domain name mapping situation of each network according to the dns server address of automatic acquisition and the analysis result of dns server, obtains the measurement result of domain name mapping in the heterogeneous networks.
Referring to Fig. 4, introduce the periodic communication process of network probe and server in this step:
(31) network probe is inquired about to dns server, obtain the IP address of server after, the TCP that initiates 80 ports to server connects.
(32) connect after, network probe is included in last measurement result in the HTTP packet and sends to server.Wherein data are used the JSON form and are placed the load of HTTP POST message.
(33) after server receives the test result of network probe, from database, take out the measurement task in next cycle in the task queue of this network probe, after use JSON formats it, place the HTTP returned packet, send to network probe.
(34) after network probe receives the message of measurement task, will from the JSON form, parse measurement task and data, deposit task queue in after, finish this TCP and connect.
(35) network probe carries out the network measure operation according to the measurement task that receives.
(36) arrive the cycle time that arranges, again begin the operation of execution in step (31), carry out interactive communication with server.
The present invention has carried out repeatedly implementing test, and test situation is implemented in now brief description emulation:
, and it is positioned in the public network as server by a Linux server, open its TCP/80 port is as the serve port of network probe.Adopt a plurality of embedded devices or computer as the network probe of this system, it is positioned in each private network, these networks all are connected with public network, between the network NAT and fire compartment wall may be arranged.
As communication module, be used for replying the request of network probe at Linux server deploy Apache Web Server.And add the PHP module as Subscriber Interface Module SIM.Use MySQL as database.
The built-in network probe is deployed in the objective network, it has network interface and ARM controller, and disposed the Embedded Protocol Stack module as the basis, developed network communication module thereon, task scheduling modules and the test module with active network measurements function.
When implementing test run, keep a plurality of measurement task queues and measurement result formation.By the periodical communication of timer triggering with server, before both communications, network probe forms first the HTTP bag of standard, after measurement result taken out from formation, be placed on again in the load of packet, set up TCP by embedded TCP/IP stack and server and be connected, then send the HTTP bag that generates to server.After server is received this bag, new measurement task is encapsulated as the HTTP bag returns to network probe.After network probe was received the bag that contains the measurement task, resolution data also deposited the measurement formation in.Then disconnecting this TCP connects.
Before timer expiry next time, network probe is carried out the measurement task.
Enforcement test of the present invention is successfully, has realized goal of the invention.
Claims (9)
1. large scale network performance measurement system that is used for IP network is characterized in that: described system is by the server that is arranged in core net that is server and client framework and be positioned at that a plurality of network probes of tested network form; Wherein:
Server, formed by the computer with mass network data-handling capacity or server, be used for generating the measurement task, and carry out interactive communication with network probe, sending measuring task and obtain measurement result, and the measurement result that network probe is uploaded is gathered and presents; Be provided with: Subscriber Interface Module SIM, task scheduling modules, communication module and four parts of database;
Network probe, by have the network measure ability, and embedded device or the computer that can communicate by letter and be distributed type assemblies with server interaction form, be used for receiving and carry out the measurement task from server, and measurement result reported server; The network measure that this network probe is carried out, finished is take active network measurements as main: judge network state by send data, observation status transmission, required time and result in network; Be provided with communication module, task scheduling modules and three parts of test module.
2. system according to claim 1, it is characterized in that: all parts function of described server is as follows:
Subscriber Interface Module SIM be responsible for to use the WEB page mode via communication module and user interactions: to obtain user's measurement demand, and be converted into the active data form and deposit database in; When the user inquired about measurement result, the measurement result that inquiry is finished from database presented to the user with data or graph mode;
Task scheduling modules, be responsible for user's measurement demand is converted to the measurement task, and according to the measurement task load situation of each network probe in dynamic adjustment mode to network probe sending measuring task, after namely taking out the measurement task from database, it is carried out real-time dynamic order and forms the measurement task sequence, and deposit in respectively in the task queue of each network probe, when communicating by letter with network probe, send to the other side via communication module;
Communication module, be provided with user interface and network probe interface, be responsible for and user and network probe interactive communication respectively: when network probe and server communication, from task scheduling modules, after the measurement task and encapsulation of this network probe of taking-up, send to this network probe; Simultaneously, after the measurement result of automatic network probe is carried out the data processing in the future, deposit in the database; And when user access server, measurement result is presented to the user by data or graph mode, and transmit measurement data according to user's inquiry to the user;
Database, be responsible for arranging a plurality of tables of data, be respectively applied to store the much information that comprises user, network probe, measurement task and measurement result that derives from each corresponding module, and the measurement task is offered task scheduling modules dispatch and distribute, and the measurement result submitted to of received communication module.
3. system according to claim 1, it is characterized in that: all parts function of described network probe is as follows:
Communication module is responsible for and server interactive communication periodically, obtain the measurement task of server after, with its unloading in the task queue of task scheduling modules; Simultaneously, receive the measurement result that test module is beamed back, and be stored in interim buffer area, so that during next time with server communication, it is reported server;
Task scheduling modules, be responsible for according to task priority to the measurement task dispatch with distribute after, give test module and carry out network measure;
Test module is responsible for receiving the measurement task from task scheduling modules, and the control of the scheduler module that receives an assignment, and initiatively carries out network measure; Described measurement task definition comprises delay PING and the route TRACEROUTE that measures between the network node, the analysis result of domain name, is the DNS inquiry.
4. system according to claim 1, it is characterized in that: the communication module network probe interface of described server and the interactive communication between the network probe use HTML (Hypertext Markup Language) HTTP, with QoS and the convenient flexible configuration fire compartment wall of guaranteeing service quality: in the measuring process, regularly initiating transmission control protocol TCP by network probe connects, by domain name mode connection server, so that the network address translation NAT of gateway can pass through in this system, carry out maximum across a network and measure; And because adopting the domain name access mode, so that server can be realized load balancing at the domain name system DNS layer, and the IP address of assurance server can realize switching and migration; Network probe uses HTTP POST mode will measure task and measurement result and puts into the packet load of small-sized data encapsulation format and send to server; Returned again the packet of http response to network probe by server, to avoid occurring the phenomenon that low memory appears in the built-in network probe.
5. method of measurement that adopts large scale network performance measurement system claimed in claim 1, it is characterized in that: described method comprises following operating procedure:
Step 1, the initial registration of network probe: after network probe is arranged at tested network, to server registration;
Step 2, network probe is carried out network measure: network probe and server cycle interactive communication, obtain the measurement task, carry out the active network measurements operation, again measurement result is sent to server.
6. method of measurement according to claim 5, it is characterized in that: in the described step 1, network probe is carried out following content of operation:
(11) first judge whether that according to the flag bit in the nonvolatile storage this network probe stored the IP address of configuration, if then carry out subsequent step (12); Otherwise, redirect execution in step (13);
(12) according to the IP address that arranges in the nonvolatile storage, the network interface configuration function that calls network protocol stack arranges the IP parameter, after accomplishing the setting up, and redirect execution in step (16);
(13) judge whether the server of carrying out DynamicHost setting protocol DHCP is set, if having, then carry out subsequent step (14) in the IP network; Otherwise, redirect execution in step (15):
(14) according to the standard of DHCP, automatically perform the operation of IP address configuration; And in carrying out the configuration operation process, any one step is carried out unsuccessfully, just changes over to carry out subsequent step (15); After only finishing configuration operation, redirect execution in step (16);
(15) user to adopt the human configuration mode be the network probe configuration of IP address: comprise and open a Webpage and the user configures alternately, or the user adds in the identical subnet in the IP address of network probe acquiescence, accesses this webpage and be the network probe configuration of IP address, or the user is the network probe configuration of IP address by debugging interface and serial ports; After finishing the human configuration of IP address, carry out subsequent step (16);
(16) submit log-on message to server, and judge whether to succeed in registration according to feedback information; If registration failure is then notified user's registration failure, and return execution in step (11), re-register; If succeed in registration, then preserve the IP address configuration information, prepare against and carry out self-configuration when restarting next time.
7. method of measurement according to claim 6, it is characterized in that: described step (14) comprises following content of operation:
(14A) the TCP connection is initiated and set up to network probe to server;
(14B) network probe will comprise that separately ID number, the log-on message of network configuration are packaged in the TCP bag, send to server again; Server is retrieved database according to its ID after receiving the log-on message bag of network probe, if find that this network probe is unregistered, then opens up new list item, finishes the registration operation; Once registered in the past if find this network probe, then upgraded its information, finished registration process;
(14C) server returns the TCP bag that comprises the information of succeeding in registration to network probe, if this network probe also has its measurement task that need to finish, then this communication TCP wraps also to comprise and measures task list for the first time;
After (14D) network probe receives the return information of server, finish registration process.
8. method of measurement according to claim 6, it is characterized in that: described step 2 comprises following content of operation:
(21) after network probe obtains the IP address of server to the dns server inquiry, initiate TCP to server and connect, so that both sides connect;
(22) after connection was set up, network probe was contained in last measurement result in the HTTP packet, sends to server again; Described measurement result data use data exchange language JSON to format, and place HTTP POST message load;
(23) after server receives the test result of network probe, from database, take out the measurement task in next cycle in the task queue of this network probe, after re-using JSON it being formatd, place the HTTP returned packet, send to network probe;
(24) after network probe receives the message of measurement task, resolution data from the JSON form, the task queue of restoring, and finish this TCP connection;
(25) network probe carries out the active network measurements operation according to the measurement task that receives; Until after reaching the cycle time that arranges, return execution in step (22), network probe is communicated by letter with server interaction, and this measurement result is contained in the HTTP packet, sends to server; Then begin new measuring period.
9. method of measurement according to claim 6 is characterized in that: in the described step (25), the active network measurements that network probe is carried out comprises following content of operation:
(25A) echo request/answering and the timer of use Internet Control Message Protocol ICMP carry out the measurement of round trip transmission delay to the target of certain IP address, obtain the time delay numerical value between network node;
(25B) echo request/answering of use ICMP, and the time-to-live TTL(Time To Live that at every turn increases progressively setting in the IP packet) field is measured the route that arrives target; Subtract 1 because ttl field is every through a router, when the TTL numerical value in the IP packet that arrives at a certain router returns 0, this router can send to the transmission address of packet the ICMP bag that comprises the TTL time-out error, from the mistake indication bag that returns, parse the address of router corresponding to this TTL numerical value for network probe, and the jumping figure that arrives router, obtain the tabulation of the IP address of router sequence between target and the network probe;
(25C) according to the dns server address of automatic acquisition, and the analysis result of dns server, the domain name mapping situation of each network relatively obtains the measurement result of domain name mapping in the heterogeneous networks.
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| CN201210370093.8A CN102891779B (en) | 2012-09-27 | 2012-09-27 | Large-scale network performance measuring system and method for IP network |
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